Creating array of pointers to class object

问题

Question:

Create an array of at least four pointers to Reader objects. Use the New operator to create at least four pointers to derived class objects and assign them to the array.

I'm not sure If I did it right or not.

Reader is the base class. John, David, Daniel, Mark are the derived class

int main(void)
{
     Reader *obj[4];

    obj[0] = new John();
    obj[1] = new David();
    obj[3] = new Daniel();
    obj[2] = new  Mark();

}

Would this be right???

回答1:

Your code is correct.

And as @sharptooth suggested, make a practice of delete on the allocated obj[]s. In C++ new allocates memory and delete deallocates.

来源：https://stackoverflow.com/questions/6212206/creating-array-of-pointers-to-class-object